Furnace.



E. FITTS.A

f unNAcE.

APPLICATION FILED AUG.25 19H.f

M 2%? Mw M M W. Nd.. V QW Wy/ E. lFITTS.

FURNACE.

APPucATloN FILED Aue.z5, 191|.

Patented Nov. 2, 1915.

2 SHEETS-SHEET 2.

, UNITED sTATEs rATENT OFFICE.

vEDWIN FITTs, OF DETROIT, MICHIGAN, AssIGNOR To DETROIT sToKER COMPANY, or

' DETROIT, MICHIGAN, A CORPORATION or MICHIGAN.

FURNACE.

new and useful Improvements in Furnaces,

of which the following i's a specification,

reference being had therein 'to the accom-` panying drawings.

The invention relates to furnaces of' that type in which a fuel magazine is arranged at the side, and a refractory arch forming the top of the combustion chamber is supported upon an abutment secured tov sald magazine. Air twyers are also provided adjacent to the, abutment for the combined purpose of lowering the temperature there- Of and supplying heated air to the combustion chamber.

It is one of the objects o f the invention to provide an abutment which is 'protected from the intense heat of the furnace chamber, and a further object is to provide air twyers which are independently detachable and renewable.

With these objects in view the invention consists in the various features of construction as hereinafter'set' forth.

In the drawings,-Figure lL is a sectional perspective view of a portion of the furnace embodying my improved constructlon; Fig. 2 is a detached perspective view of the detachable -twyer member, the locking key therefor and the heat insulating member for the arch abutment; Fig. 3 is a vertical cross section of the arch 4and its support; and

Fig. 4 is a side elevation partly in section showing the manner of detachably engaging the twyers. l

A is a member forming the inner wall of the fuelmagazine and the support for the arch' abutment. This member is preferably formed of cast metal and is provided on its inner face with a pluralityof inwardlyextending strengthening ribs or ledges B, B', .B2 which in conj-unction with intersecting vertically extending flanges C form a rigidly trussed structure. The. refractory arch is preferably formed -of an outer and an inner arch section D and E. having an. air chamber F therebetween, both kof said sections having abutments upon the member A. As

shown, the upper` arch section D abuts against the plate Gr lsupported upon the in- Specification-of Letters Patent.

Application led August 25, 1911. Serial No. 646,077.

Patented N ov. 2, 1915.

flanges 0. The lower arch section E which is subjected to the most intense'heat is also lsupported by the vertical flanges C, which tao this end are provided with inward eXtenv sions H preferably of triangular shape. rI"he inclined 4face vof these extensions H are at the proper angle to receive the thrust of the arch perpendicular thereto, and to take care of the stress therein, ribs I are preferably arranged at'the lower edge of this triangular section.

The extensions Hare protected from the heat of the furnace chamber by refractory blocks arranged beneath the same. These blocksA J are preferably of a length to extend between adjacent vertical flanges C and are preferablyI supported by lgfooved bearings K'at the opposite ends thereof, which are engaged with the ribs I on the sections H. Beneath the point of engagement the vblocks J are provided with end extensions L which abut against each other. in place the blocks completely shield the abutment sections H and prevent the over- .-,by' upwardly extending hook members I whlch lie adjacent to the magazine wall A The'sections M are supportedy preferably Thus when iand engage with socket members Q thereon. t

The arrangement is such that the sections M may be successlvely placed in engagement with the member A by first moving the hooks P upward into the sockets Q, and then shifting said member laterally to engage the 4hook with the top of the socket. The ends of the members M are preferably fashionedl with overlapping flanges M and M2, Sullicient clearance being provided to permit the longitudinal adjustment necessary for engagement and disengagement of the hooks P. The members M are locked from disengagement by keys R which may be dropped into .grooves formed by the overlapping flanges Ml and M2, a head R- on each key prevent- 55 clined faces G of the vertically extending ing its dropping out. One of Lthe end members is also preferably provided'with reverse turned hooks P.

IVith the construction as described in lirst building the arch the blocks J are placed in engagement with the flanges I. The arch section E is then laid, the triangular members I-I forming the abutments. Or if dei sired, a straight bar S may be placed over these triangular members and the arch built thereon. It will be noted that the blocks ,I do not form any part ofthe arch proper and all of the stresses developed in the arch are transmitted directly to the abutments II without passing through said blocks J, the function of which is to form a heat insulation for the metallic members. Furthermore, the stresses of the arch are not transmitted through the twyer members M and as a consequence these members may at any time be removed and replaced without affecting the arch.

In the continued use of the furnace the twyer members IVI will occasionally burn out, and whenever this occurs they may be removed and replaced without disturbing the arch abutment. Thus it is only necessary to remove the key R which locks any particular twyer member in position, after which it may be adjusted laterally tovdisengagethe hooks 4P and drawn out of engagement with the sockets Q. A new section may then be engaged and locked by the key.

rIhe construction of the member A with the flanges C and eXtensions'II is Vsuch as to form a rigid arch abutment and at the same time one in which the metallic parts are thoroughly protected from the heat of the furnace chamber.

What I claim as my invention is:

.1. In a furnace, the combination with a refractory arch, of a fuel magazine having a feed opening into the furnace chamber, the inner wall of said magazine being provided with means projecting therefrom forming arch abutments above said feed opening, and independent heat protecting members for said abutments arranged below the same and supported wholly thereby.

2. In a furnace, the combination with a y refractory arch, of a fuel magazine having a feed opening into the furnace chamber, the inner wall of said magazine being provided with a series of vertical flanges projecting therefrom and forming arch abutments, and heat protecting members for said abutments arranged between said flanges and suspended therefrom above said feed opening.

3. In a furnace, the combination of a refractory arch, of a fuel magazine having a feed opening at its lower end into the furnace chamber, an arch abutment integral with the wall of the magazine whereby the compression stresses are directly transmitted to said wall of the magazine, and a heat insulating member above said feed opening suspended from said abutment and protecting the same. l

4. In a furnace, the combination with a refractory arch and an abutment therefor, of a heat insulating member supported by said abutment for protecting the abutment, and a twyer member' below said heat protecting member independently removably secured to a part integral with said arch abutment.

5. In a. furnace, the combination with a refractory arch and an abutment therefor, of a heat protecting member for said abutment arranged beneath the same,'and a metallic 'twyer member detachably secured to apart connected with said abutment, said heat protecting member and twyer member being ment, a twyer member below said -arch abutment, and having means for detachably supporting the same from said inner wall of the magazine, said twyer member comprising a plurality of over-lapping interengaging parts adapted to be detached one from the other and from said inner wall of the magazine by a relative sliding movement.

8. In a furnace, the combination with a refractory arch, 0f a magazine having an inner wall provided with an abutment for said arch, a twyer member adapted to underlie said abutment having upwardly extending hooks, there being sockets formed on said inner wall of the magazine with -which said hooks are detachably engaged, and a heat protecting member interposed between the twyer member and the arch abutment and supported by the latter.

9. In a furnace, the combination with a refractorv arch, of a lfuel magazine having a member forming the inner wall thereof, and an arch abutment, heat protecting members for the abutment, supported by and maintained in place by the abutment, aseries of twyer members having'laterally extending suspension hooks independently detachably engaging said inner wall member, and a locking member interposed between adjacent sides of the twyer members. Y

l0. In a furnace, the combination with an arch abutment, and an arch supported thereby, of an independent removable heat protecting part comprising sections detachably maintain the sectins against accidental separation. Y

11. In a furnace, the combination with an upright 'wall having laterally extending flanges forming an arch seat or abutment, an arch supported by said abutment, a series of removable heat protecting members underlying said flanges, and projecting` parts on certainof said flanges to engage the heat protecting members for supporting the same vertically.

12. In a furnace, the combination of an upright wall having laterally projecting flanges forming seats or abutments, an arch supported by said abutments, a removable heat protecting member underlying said abutments, and a plurality of independently removable metallic plate members supported by said wall and underlying theheat protecting members, and said supporting means permitting independent removal of plate of the series without disturbing adjacent plates of the series.

13. In a furnace, the combination with a refractory arch, of a fuel magazine having a feed opening into the furnace chamber, the inner wall of said magazine having a part to engageand form an ,abutment or 'seat for the end wall of the arch, and 'heat protecting members engaging over the under surface of said abutment and secured inA place against accidental vertical separation by a part integral with the abutment.

14. In a furnace, the combination of a refractory arch, of a fuel magazine having a feed opening into the furnace chamber, the inner wall of said magazine having flanges extending vertically at an incline forming arch abutments or seats, and also having laterally extending flanges, a series of detachable protecting members having receiving pockets to engage said lateral flanges, said members underlying the abutments and said lateral flanges, the connection between saidv lateral flanges and pockets maintaining the protecting members against downward separation.

15. In a furnace, the combination of a refractory arch, of a fuel magazine having a feed opening into the furnace chamber, the inner wall of said magazine having flanges extending vertically at an incline forming arch abutments or seats, and also having laterally extending flanges, a series of detachable protecting members having receiving pockets to engage said lateral flanges, saidA members underlying the abutments and said lateral flanges, and a plurality of independently removable plates supported from said inner wall 4of the magazine and underlying the heat protecting members.

16. In a furnace, the combination of a re` any fractory arch, of a fuel magazine having a feed opening into the furnace chamber,

means projecting inwardly from said inner wall forming an' arch abutment or seat, a series of abutting independently detachable metallic plates supported from said inner wall and projecting inwardly below the abutments, and heat protecting means interposed between said plates and said abutments.

17. In a furnace, the 'combination of ai refractory arch, of a fuel magazine having a feed opening into the furnace chamber, 'Y

means projecting inwardly from said inner wall forming an arch abutment or seat, a series of over-lapping interengaging independently removable plates supported from said inner wall andprojecting inwardly be- 10W vthe abutments, and heat protecting means interposed between said plates and said abutments, said heat protecting means comprising a plurality of detachable sections.

18. In a furnace, the combination of an arch, a fuel magazine having a feedopening into the furnace chamber, means projecting from the inner wall of the furnace to form an arch seat, and heat protecting means for the arch seat comprising a plurality of.in dependent blocks having end grooves, and lateral projections on said inner wall to engage within said grooves to support the blocks iny position. j

19. In a furnace, the combination of an arch, a fuel magazine having afeed opening into the furnace chamber, means projecting from the inner wall of the furnace to form an arch seat, heat protecting means for the arch seat comprising a plurality of independent` blocks having end grooves, and lateral projections onsaid inner wall to engage within said grooves to support the blocks in position, and saidvblocks having end pro-- under surface of said abutment, and an aux.

iliary projection integral with said abutment and inner wall of the magazine to engage vsaid heat protecting members so as to detachably maintain the same in place.

21. In a furnace, the combination with a refractory arch, of a. fuel magazine'having a feed opening into the furnace, the inner wall of said magazine having an inward projection adaptedl to engage and form an abutment or seat for the end wall of the arch', heat protecting members engaging over the under surface of said abutment, an auxiliary projection integral with said'abutment and members having overlapping portions, and inner Wall of the magazine to engage said adaptedto be moved laterally whereby the heat protecting members so as to detaohably respective tWyer members are released from maintain the same in place, and metallic one another and from said inner Wall.

5 twyer members adapted to underlie said pro- In testimony whereof I aiiiX my signature 15 tecting members and having upward proin presence of two Witnesses. jeotions to engage the under surface of the EDWIN FITTS. protecting members, means for` detaohably Witnesses: supporting said twyer members from the u JAMES P. BARRY,

10 inner wall of said magazine, and said twyer DELBERT COLLINS. 

